20100102021211 has 4 divisors (see below), whose sum is σ = 20748492409024. Its totient is φ = 19451711633400.

The previous prime is 20100102021199. The next prime is 20100102021217. The reversal of 20100102021211 is 11212020100102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20100102021211 - 2⁵ = 20100102021179 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20100102021191 and 20100102021200.

It is not an unprimeable number, because it can be changed into a prime (20100102021217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 324195193860 + ... + 324195193921.

It is an arithmetic number, because the mean of its divisors is an integer number (5187123102256).

Almost surely, 2^{20100102021211} is an apocalyptic number.

20100102021211 is a deficient number, since it is larger than the sum of its proper divisors (648390387813).

20100102021211 is an equidigital number, since it uses as much as digits as its factorization.

20100102021211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648390387812.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20100102021211 its reverse (11212020100102), we get a palindrome (31312122121313).

The spelling of 20100102021211 in words is "twenty trillion, one hundred billion, one hundred two million, twenty-one thousand, two hundred eleven".